diff --git a/keygen/keygen.c b/keygen/keygen.c
index dd56b70..1c9726f 100644
--- a/keygen/keygen.c
+++ b/keygen/keygen.c
@@ -175,7 +175,7 @@ char *get_mac()
 	FILE * fp;
 	char *mac = malloc(18* sizeof(char));
 	fp = fopen("/sys/class/net/ap0/address", "r");
-	fgets(mac, 17, fp);
+	fgets(mac, 18, fp);
 	fclose(fp);
 	return mac;
 }
@@ -183,9 +183,9 @@ char *get_mac()
 char *get_serial()
 {
 	FILE * fp;
-	char *serial = malloc(21* sizeof(char));
+	char *serial = malloc(33* sizeof(char));
 	fp = fopen("/etc/serial", "r");
-	fgets(serial, 20, fp);
+	fgets(serial, 33, fp);
 	return serial;
 }